OAA computing section circular NK 853 105P/Singer Brewster
The following improved orbital elements, by S. Nakano, are from 63 observations 1986 to 1999. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.90 arc second. See an orbit in NK 633. Epoch = 1999 Apr. 12.0 TT T = 1999 Apr. 6.45081 +/- 0.00027 (m.e.) TT Peri. = 46.80367 +/- 0.00021 Node = 192.54559 +/- 0.00019 (2000.0) Inc. = 9.18770 +/- 0.00003 q = 2.0323725 +/- 0.0000011 AU e = 0.4127568 +/- 0.0000003 a = 3.4608705 +/- 0.0000008 AU n' = 0.15308268 +/- 0.00000005 P = 6.438 +/- 0.0000022 years T = 1986 June 8.93512 TT Epoch = 1986 June 19.0 TT Peri. = 45.32581 e = 0.4264729 Node = 193.44962 (2000.0) a = 3.4093031 AU Inc. = 9.30493 n'= 0.15656896 q = 1.9553278 AU P = 6.295 years T = 1992 Oct. 27.23438 TT Epoch = 1992 Oct. 25.0 TT Peri. = 46.64581 e = 0.4137651 Node = 192.61669 (2000.0) a = 3.4570851 AU Inc. = 9.19278 n'= 0.15333418 q = 2.0266639 AU P = 6.428 years The predicted orbit for the 2005 return is as follows: T = 2005 Sept.11.34841 TT Epoch = 2005 Sept.27.0 TT Peri. = 46.64860 e = 0.4109079 Node = 192.47168 (2000.0) a = 3.4651461 AU Inc. = 9.17963 n'= 0.15279943 q = 2.0412902 AU P = 6.450 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1986/ 860604 675 0.8- 0.5- 1993/ 860503 675 0.4- 0.3- 860604 323 1.3- 1.3+ 930720 691 0.1- 0.7+ 860503 675 (3.7+ 3.2-) 860605 801 0.1+ 0.3+ 930720 691 0.3+ 0.5+ 860505 474 1.0+ 0.3+ 860606 707 0.9+ 0.7+ 930720 691 0.0 0.5+ 860505 399 1.6+ 0.9+ 860606 691 1.0+ 0.1- 930724 691 0.5- 1.2+ 860505 474 (0.9- 2.5+) 860606 691 1.2+ 0.2- 930724 691 0.3- 0.8+ 860505 399 (1.9+ 3.8+) 860606 675 0.3- 0.6+ 930816 691 0.1- 0.2+ 860506 474 (0.8+ 2.8+) 860607 691 (0.4- 2.8-) 930816 691 0.9- 0.5- 860506 474 (0.4+ 3.0+) 860607 691 (0.3- 2.7-) 930816 691 0.6- 0.1+ 860506 372 2.4- 1.5+ 860607 691 (0.5- 2.5-) 930916 691 0.9+ 0.1+ 860506 372 0.4- 1.8- 860612 707 0.2- 0.7- 930916 691 0.2+ 0.3+ 860508 657 (2.0- 3.0+) 860706 691 0.5- 0.2- 930916 691 0.3+ 0.6+ 860508 474 0.8+ 0.4- 860706 691 0.6- 0.0 1999/ 860508 474 (4.1+ 0.1-) 860706 691 0.5- 0.5- 990213 693 1.3+ 0.4- 860508 323 0.3- 0.5+ 860708 801 (4.6+ 7.2+) 990213 693 0.6+ 0.5- 860509 801 0.7- 0.5+ 860711 323 (3.3+ 0.0 ) 990213 693 0.5+ 0.4- 860510 801 1.3- 1.2+ 860712 707 0.1- 1.7+ 990412 693 (1.1- 2.1-) 860510 293 (0.1- 2.8+) 860727 691 0.3+ 0.9+ 990412 693 1.5- 1.7- 860510 293 0.0 1.9+ 860727 691 1.0+ 0.5+ 990608 360 0.2- 1.6- 860513 688 (3.2- 3.6-) 860727 691 0.2+ 1.4+ 990608 360 0.2- 1.2- 860513 688 (0.7+ 3.6-) 860906 691 0.7+ 0.5- 990611 867 0.0 1.1- 860514 474 0.1+ 1.7- 860906 691 0.5+ 1.5+ 990611 867 0.7+ 1.4- 860514 474 0.0 1.4- 860906 691 0.5- 0.3- 990614 704 0.7+ 0.9- 860514 372 0.7- 2.4+ 1992/ 990614 704 (0.6+ 2.1-) 860516 323 (4.7+ 1.2-) 920401 691 0.2+ 0.2+ 990614 704 0.1- 1.8- 860528 323 0.5+ 2.1+ 920401 691 1.0+ 0.6+ 990614 704 1.0- 1.4- 860529 323 1.5+ 0.2+ 920404 691 0.2- 1.2- 990614 704 0.1- 1.0- 860530 323 0.2+ 0.6+ 920404 691 1.0- 1.3- 860603 801 1.6+ 0.0 920404 691 0.5- 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 8